Notes: Although the dak bands are similar to Lehmannia marginata (alias Limax marginatus - the name has swapped around in both directions in the last century), this is actually a round-back slug. There's no keel down the back, and the mantle is rough and pitted, but without a fingerprint pattern. It's also got a stripey foot-fringe (visible at the rear of the right hand specimen) which makes it one of the larger species. But the tubercles across the back are fine and there are lots, which rules out the big beasts, Arion ater, rufus, vulgaris or flagellus. So, Arion subfuscus, with thick, sticky orange body slime, which is just visible at the front end.